The former Yugoslav Republic of Macedonia
II. BASIC FREEDOMS AND RIGHTS OF THE INDIVIDUAL AND CITIZEN
1. Civil and political freedoms and rights
Article 14
No person may be punished for an offence which had not been declared an offence punishable by law, or by other acts, prior to its being committed, and for which no punishment had been prescribed.
Non-retroactivity
Nullum crimen sine lege
Nulla poena sine lege
EDIT.